A 46-year-old man and his 29-year-old girlfriend were just finishing a round of golf at the course when they got into a dispute with a foursome on the 18th green, Delaney, aide to Police Commissioner William J. Fitchet, said.

One of the four, a white male in his 40s, head-butted the victim in the face, causing his nose to swell and bleed, Delaney said.

The victim’s girlfriend, meanwhile, said that a white male in his 30s threw a golf ball at her, just missing her head, Delaney said.

The foursome also had a child believed to be about 13 years old with them. They left in two separate vehicles, a Ford and a GMC. Witnesses were able to provide police with the plate numbers on both.

The suspected head-butter is described as being about 5 feet, 9 inches tall, with a medium build and black and gray hair. The suspected ball-thrower is described as being about 6 feet, 2 inches tall and about 170 pounds, Delaney said.

Detectives continue to probe the assault.

Delaney said he did not know the exact nature of the argument. “It was something to do with golf,” he said. “Either they played through or something, I don’t know.”